Preparation method of slow-release synergistic coated fertilizer

Abstract

The invention discloses a preparation method of a fertilizer slow-release synergistic coating film. The preparation method comprises the following steps: 1, preparing an epoxy reagent; 2, synthesizing epoxidized soybean oil; 3, preparing an epoxidized soybean oil polyhydric alcohol oligomer; 4, uniformly coating the fertilizer and the epoxidized soybean oil polyhydric alcohol oligomer by using a disc granulator; and 5, spraying an insecticide into the coated fertilizer obtained in the step 4, and drying. According to the obtained slow-release synergistic coated fertilizer, the fertilizer consumption can be reduced, and the utilization rate is increased; the fertilizer can be matched with a quick-acting fertilizer to serve as a base fertilizer for one-time application, fertilization labor is reduced, application is safe, and fertilizer damage is prevented; after application, the fertilizer efficiency is stable and long, force loss is avoided in the later period, the coated film fertilizer contains the insecticide, pests in soil can be killed, and then the purpose of increasing both production and income is achieved.

Description

Technical field [0001] The present invention relates to the field of soil fertilizer technology, in particular a method of sustained-release efficiency enveloping membrane fertilizer. Background technique [0002] Plant growth development requires a large number of nutrients, of which nitrogen phosphorus potassium fertilizer has played a huge role in promoting high yield of agriculture. In these three nutrient elements, the particularity of the two elements of nitrogen and phosphors in the soil and the blind application of fertilizers are highlighted, and the fertilizer utilization is very low. At present, there are only 27.5%, 11.6% and 31.5, and only 27.5%, 11.6% and 31.5, respectively, of China's three major food crops. In the concentration of vegetable fruit and vegetables, the utilization of nitrogen phosphorus fertilizer is less than 10% in the intensive level, but the lower fertilizer utilization not only means the increase in agricultural production costs and the decline ...

AI Technical Summary

Problems solved by technology

In concentrated vegetable, fruit and vegetable production areas with a relatively high degree of intensification, the utilization rate of nitrogen and phosphorus fertilizers is even less than 10%. The lower fertilizer utilization rate not only means the increase of agricultural production costs and the decline of economic benefits, but also means the loss of resources and energy. Huge waste and serious pollution to the environment

In addition, during the growth process of plants, diseases and insect pests often occur, resulting in reduced production and other situations, affecting the increase in crop production and harvest.